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Message-ID: <1671012352-1825-2-git-send-email-quic_vpolimer@quicinc.com>
Date:   Wed, 14 Dec 2022 15:35:38 +0530
From:   Vinod Polimera <quic_vpolimer@...cinc.com>
To:     <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        <freedreno@...ts.freedesktop.org>, <devicetree@...r.kernel.org>
CC:     Vinod Polimera <quic_vpolimer@...cinc.com>,
        <linux-kernel@...r.kernel.org>, <robdclark@...il.com>,
        <dianders@...omium.org>, <swboyd@...omium.org>,
        <quic_kalyant@...cinc.com>, <dmitry.baryshkov@...aro.org>,
        <quic_khsieh@...cinc.com>, <quic_vproddut@...cinc.com>,
        <quic_bjorande@...cinc.com>, <quic_aravindh@...cinc.com>,
        <quic_abhinavk@...cinc.com>, <quic_sbillaka@...cinc.com>
Subject: [PATCH v9 01/15] drm/msm/disp/dpu: clear dpu_assign_crtc and get crtc from connector state instead of dpu_enc

Update crtc retrieval from dpu_enc to dpu_enc connector state,
since new links get set as part of the dpu enc virt mode set.
The dpu_enc->crtc cache is no more needed, hence cleaning it as
part of this change.

This patch is dependent on the series:
https://patchwork.freedesktop.org/series/110969/

Signed-off-by: Vinod Polimera <quic_vpolimer@...cinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c    |  4 ---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 42 +++++++++--------------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h |  8 ------
 3 files changed, 13 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 3f72d38..289d51e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -1029,7 +1029,6 @@ static void dpu_crtc_disable(struct drm_crtc *crtc,
 		 */
 		if (dpu_encoder_get_intf_mode(encoder) == INTF_MODE_VIDEO)
 			release_bandwidth = true;
-		dpu_encoder_assign_crtc(encoder, NULL);
 	}
 
 	/* wait for frame_event_done completion */
@@ -1099,9 +1098,6 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
 	trace_dpu_crtc_enable(DRMID(crtc), true, dpu_crtc);
 	dpu_crtc->enabled = true;
 
-	drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask)
-		dpu_encoder_assign_crtc(encoder, crtc);
-
 	/* Enable/restore vblank irq handling */
 	drm_crtc_vblank_on(crtc);
 }
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index a585036..b9b254d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -132,11 +132,6 @@ enum dpu_enc_rc_states {
  * @intfs_swapped:	Whether or not the phys_enc interfaces have been swapped
  *			for partial update right-only cases, such as pingpong
  *			split where virtual pingpong does not generate IRQs
- * @crtc:		Pointer to the currently assigned crtc. Normally you
- *			would use crtc->state->encoder_mask to determine the
- *			link between encoder/crtc. However in this case we need
- *			to track crtc in the disable() hook which is called
- *			_after_ encoder_mask is cleared.
  * @connector:		If a mode is set, cached pointer to the active connector
  * @crtc_kickoff_cb:		Callback into CRTC that will flush & start
  *				all CTL paths
@@ -181,7 +176,6 @@ struct dpu_encoder_virt {
 
 	bool intfs_swapped;
 
-	struct drm_crtc *crtc;
 	struct drm_connector *connector;
 
 	struct dentry *debugfs_root;
@@ -1317,7 +1311,7 @@ static void dpu_encoder_vblank_callback(struct drm_encoder *drm_enc,
 		struct dpu_encoder_phys *phy_enc)
 {
 	struct dpu_encoder_virt *dpu_enc = NULL;
-	unsigned long lock_flags;
+	struct drm_crtc *crtc;
 
 	if (!drm_enc || !phy_enc)
 		return;
@@ -1325,12 +1319,13 @@ static void dpu_encoder_vblank_callback(struct drm_encoder *drm_enc,
 	DPU_ATRACE_BEGIN("encoder_vblank_callback");
 	dpu_enc = to_dpu_encoder_virt(drm_enc);
 
-	atomic_inc(&phy_enc->vsync_cnt);
+	if (!dpu_enc->connector || !dpu_enc->connector->state ||
+	    !dpu_enc->connector->state->crtc)
+		return;
 
-	spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
-	if (dpu_enc->crtc)
-		dpu_crtc_vblank_callback(dpu_enc->crtc);
-	spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
+	atomic_inc(&phy_enc->vsync_cnt);
+	crtc = dpu_enc->connector->state->crtc;
+	dpu_crtc_vblank_callback(crtc);
 
 	DPU_ATRACE_END("encoder_vblank_callback");
 }
@@ -1353,33 +1348,22 @@ static void dpu_encoder_underrun_callback(struct drm_encoder *drm_enc,
 	DPU_ATRACE_END("encoder_underrun_callback");
 }
 
-void dpu_encoder_assign_crtc(struct drm_encoder *drm_enc, struct drm_crtc *crtc)
-{
-	struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
-	unsigned long lock_flags;
-
-	spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
-	/* crtc should always be cleared before re-assigning */
-	WARN_ON(crtc && dpu_enc->crtc);
-	dpu_enc->crtc = crtc;
-	spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
-}
-
 void dpu_encoder_toggle_vblank_for_crtc(struct drm_encoder *drm_enc,
 					struct drm_crtc *crtc, bool enable)
 {
 	struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
-	unsigned long lock_flags;
+	struct drm_crtc *new_crtc;
 	int i;
 
 	trace_dpu_enc_vblank_cb(DRMID(drm_enc), enable);
 
-	spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
-	if (dpu_enc->crtc != crtc) {
-		spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
+	if (!dpu_enc->connector || !dpu_enc->connector->state)
+		return;
+
+	new_crtc = dpu_enc->connector->state->crtc;
+	if (!new_crtc || new_crtc != crtc) {
 		return;
 	}
-	spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
 
 	for (i = 0; i < dpu_enc->num_phys_encs; i++) {
 		struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
index 7f3d823..eb9fc7c 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
@@ -40,14 +40,6 @@ struct msm_display_info {
 };
 
 /**
- * dpu_encoder_assign_crtc - Link the encoder to the crtc it's assigned to
- * @encoder:	encoder pointer
- * @crtc:	crtc pointer
- */
-void dpu_encoder_assign_crtc(struct drm_encoder *encoder,
-			     struct drm_crtc *crtc);
-
-/**
  * dpu_encoder_toggle_vblank_for_crtc - Toggles vblank interrupts on or off if
  *	the encoder is assigned to the given crtc
  * @encoder:	encoder pointer
-- 
2.7.4

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